Pulley system -- Calculate the mass that balances this pulley system

[FFTB]

Homework Statement

Calculate the mass of mB that makes the system to be in equilibrium. Neglect the possible friction

Relevant Equations

Sin cos tan

I've been stuck at this pulley system for a while.
I've calculated the force of which A pulls => FA = sin25*50*9.82 = 208.5 N
But I get stuck on the free body diagram.
Can someone help and explain the freebody diagram

 

[Chestermiller]

Let T be the tension in the rope. Does it vary along the rope? What is the tension force on mass A? On mass B?

 

[haruspex]

Your work looks ok except for $m_B=T$. What have you missed out?
As a matter of style, learn to work entirely symbolically, only plugging in numbers at the end. It has many advantages.
In the present case, you could have avoided some arithmetic since g would cancel.